JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<h1><span id="timerText">--:--</span> Remaining</h1>

<form name="myquiz" id="myquiz" method="post" action="">
    <label class="content_question">What is the best IDE?</label>
    <fieldset class="answers">
        <input id="464" name="answer_id_01" type="radio" value="464">Option 1
        <input id="465" name="answer_id_01" type="radio" value="465">Option 2
        <input id="466" name="answer_id_01" type="radio" value="466">Option 3
        <input id="467" name="answer_id_01" type="radio" value="467">Option 4</fieldset>
    <label class="content_question">What is linear programming?</label>
    <fieldset class="answers">
        <input id="468" name="answer_id_01" type="radio" value="468">Option 1
        <input id="469" name="answer_id_01" type="radio" value="469">Option 2
        <input id="470" name="answer_id_01" type="radio" value="470">Option 3
        <input id="471" name="answer_id_01" type="radio" value="471">Option 4</fieldset>
    <input type="submit" name="save" id="save" value="Submit Test">
</form>

CSS

fieldset {
    padding: 0 15px 20px;
}

JavaScript

$(function () {
    // Config
    var mins = 5; // Min test time
    var secs = 0; // Seconds (In addition to min) test time
    var timerDisplay = $('#timerText');

    //Globals: 
    var timeExpired = false;

    // Test time in seconds
    var totalTime = secs + (mins * 60);

    // This sourced from: http://stackoverflow.com/questions/532553/javascript-countdown
    var countDown = function (callback) {
        var interval;
        interval = setInterval(function () {
            if (secs === 0) {
                if (mins === 0) {
                    timerDisplay.text('0:00');
                    clearInterval(interval);
                    callback();
                    return;
                } else {
                    mins--;
                    secs = 60;
                }
            }
            var minute_text;
            if (mins > 0) {
                minute_text = mins;
            } else {
                minute_text = '0';
            }
            var second_text = secs < 10 ? ('0' + secs) : secs;

            timerDisplay.text(minute_text + ':' + second_text);
            secs--;
        }, 1000, timeUp);
    };

    // When time elapses: submit form
    var timeUp = function () {
        alert("Time's Up!");
        timeExpired = true;
        document.getElementById('myquiz').submit();
    };

    // Start the clock
    countDown(timeUp);

    $('#myquiz').submit(function () {
        // User time still yet to elapse and form was submitted by user: check if all questions were answered
        if (!timeExpired) {
            var errors = [];
            $('.content_question').each(function () {

                var answer = $(this).next();
                var inputs = answer.find('input[type=radio], input[type=checkbox]');

                if (inputs.length > 0) {
                    var groupChecked = false;

                    inputs.each(function () {
                        if ($(this).is(':checked')) {
                           ...